Flexible centrifugal pot for spinning or doubling all kinds of fibers and device for discharging it



Jan. 2 6, 1937. A. ARANcS-PRATMARSCS 2,968,815

FLEXIBLE CENTRIFUGAL POT FOR SPINNING OR DOUBLING ALL KINDS OF FIBERS AND DEVICE FOR DISCHARGING IT Original Filed June 2'7, 1934 Patented Jan. 26, 1937 UNITED STATES PATENT OFFICE NING OR DOUBLENG ALL KINDS FIBER-S AND DEVICE ING IT OF FOR DISCHARG- Alberto Arailo-Pratmarso, Barcelona, Spain Application June 27, 1934, Serial No. 732,733. Renewed July 15, 1936. In Spain July 6, 1933 4 Claims.

The present invention relates to centrifugal apparatus for spinning or doubling provided with doiiing devices and more particularly to an apparatus of this kind comprising a centrifugal pot or spinning chamber for spinning or doubling yarns of all kinds of fibrous material and to the devices for dofiing the yarn accumulated in the said pot.

The invention consists in a centrifugal apparatus or spinning chamber for spinning or doubling yarns of all kinds of fibrous material provided with dofiing devices, constituted by an exterior tube preferably in the form of a hollow truncated cone with its larger base at the lower part, closed and supported by simple contact at each of its ends by one member mounted on a bearing of the spherical socket type, and also being characterized by the fact that the contact is made with the lower supporting member with interposition of an elastic ring placed above the centre of the corresponding spherical bearing, and that it receives its rotating movement, by any known means operating centrally with the same spherical bearing, and permitting its free play and rendering flexible, due to this fact, the whole of the spinning chamber.

The said centrifugal spinning chamber improves the conditions under which the twist is actually applied to the thread in the continuous spinning or twisting frames, and it has been designed to replace the ring spindles, flyer spindles, etc. in the existing frames. The yarn follows a more rational path than in the case of the above mentioned spindles and is not exposed to exaggerated tensions nor to pronounced air friction. The aforesaid provisions and the form of the spinning chamber itself allow the apparatus to work well at speeds considerably greater than those used for the spindles referred to above, and with the said apparatus yarn of better appearance may be obtained.

At the same time, account is taken of the mechanization of the changing of the full cop, reducing the stoppages and the labour, and further providing the possibility of applying the winding that is most convenient for the later utilization of the yarn.

This invention is particularly described with reference to the accompanying drawing, forming part of this specification.

In Fig. I is seen the spinning chamber, as viewed from the front of the spinning or twisting frame, closed, in the working position, with the tube l lowered and supported on the lower plate 2 and the yarn guides ll, I3, and I4 in any position of its travel.

In Fig. II the spinning chamber is seen from the side, open, in the discharging position, after the solid body of yarn has fallen, and indicating the position which the yarn takes up, forming an angle with the knife blade 18 which effects the cutting operation.

In both figures the thread has been represented by dotted lines. In the figures all the non-relevant details of the spinning or twisting frame have been omitted, only the form of the centrifugal apparatus and the rails which support it having been indicated.

Figs. III and IV are axial sections in detail of the pieces 2,3,-4, and I which support the tube 5 at each end, showing the arrangement of the bearings in the particular case of ball bearings, with fixed interior track, and the piece 2,3, 4 having a whirl to be directly actioned by means of a tape.

For the sake of clearness the mechanisms which constitute this invention are described in two distinct groups, each of them having its own function, even though for the application of the same it is indispensable that they function together.

The said groups are:

(1) The centrifugal pot or spinning chamber itself, to give twist to the thread supplied by the rollers of the spinning or twisting frame, and the mechanisms which guide this thread permitting within the spinning chamber the winding of the same until it forms a solid body ready to be afterwards transported and unwound.

(2) The devices which permit the solid body of yarn to be expelled from the spinning chamber once it has been formed, and the formation of a new one to be started.

The centrifugal pot or spinning chamber essentially consists in a tube I closed at each end by members 2 and 1 respectively which support it by simple contact. Each of these pieces is mounted on a bearing of the spherical or selfaligning type which may be a ball bearing, roller bearing or the like.

The lower one of said members 2 has a projecting edge 3 which prevents the tube I from descending and makes contact with it by means of a ring 2' of elastic material such as, for example rubber. Under said edge 3 the said member 2 carries the rotating part of its bearing and receives its movement, the said bearing being, in the particular case shown in the drawing (see Fig. IV) enclosed in a Whirl 4 to be actuated directly by a tape. The axis or fixed part of this bearing is firmly fastened to a rail of the frame.

More generally, the bearing above which the piece 2 is mounted must carry centred with its spherical socket, and permitting the free play of the same, the means for imparting rotation by means of the mechanism which actuates the spinning chamber, which mechanism, apart from the one described above, may be any other known mechanism operating directly or by means of a vertical shaft. According to the method of actuation adopted, the rotating part of this hearing, moving with piece 2, may be either the outer or the inner one, the other being fastened to a rail of the spinning frame.

On the ring made of elastic material carried by the plate 2, is freely supported by simple contact and in virtue of its weight the tube or lateral cover of the pot l in the form of a hollow truncated cone, with its largest diameter located at its lower portion.

This tube is carried with the plate in its rotating movement, and it is intended to contain the yarn, and to form with the members 2 and l the spinning chamber. It has sufficiently large capacity for a great quantity of yarn. Near its base it carries two projecting flanges 55' which are adopted to allow of its vertical displacement by means of a fork 6 and at the same time strengthen it in its greatest diameter.

The tube I at its upper end bears parallel to the axis of the spinning chamber against the member I (seen in detail in Fig. III). The said member is mounted on a bearing, also of the selfaligning or spherical type, in such a way that, as it is hollow, it leaves a passage in its centre for the entrance of the yarn and of the guide.

As a result of the combination of these three parts the centrifugal spinning chamber is closed and supported at its two ends in a flexible manner, and has a low critical speed and high stability of rotation at high speeds.

The above mentioned flexibility is obtained by the contact of the tube against the lower support with the interposition of the elastic ring, also by the spherical bearings which support the tube, and specially by the situation of the lower support 2 above the centre of its spherical bearing permitting the tube to be centred by gravity. The oscillations of the tube at starting are limited by the fork 6.

The fixed part of the bearing of the lower plate is mounted in a rule 8 similarly to the spindles of the spinning frames. The upper hearing, which has a free passage left in its centre, is fixed to the lower end of a part 9 whose length is greater than that of the tube and which is formed of two parallel arms lD-lll which are joined at their ends. This part serves as a guide at its outer face, for the tube, in its vertical displacement (which will be hereinafter described when setting forth the procedure of discharging the pot) and further at its inner face, for the yarn guiding mechanism for the winding of the yarn also hereinafter described. The said double guide is fastened to an upper rail 12 of the spinning frame which is maintained at a fixed distance from the lower rail 8, and its form allows the passage of the fingers of the operative.

The yarn guide mechanism essentially consists in a small eyelet l3 which has a vertical oscillating movement in the axis of the pot above described.

This guide is united, by means of a wire or tubular part H which passes through the fixed part of the upper bearing, leaving free passage for the yarn, the axis of the pot and of the double guide, with a part H which slides on the interior of the said double guide and which receives its movement from a rail which actuates all those members on one side of the spinning frame, and this rail, moved by the mechanisms usual in this kind of machine, oscillates vertically, its path being varied in the manner most suitable for the winding of the yarn.

The yarn follows the following path: on leaving the rollers or cylinders of the spinning frame it passes through an eyelet l5 mounted in the upper fixed rail it into which it is introduced through a slit, it descends by the axis of the double guide 9, passes through the centre of the upper bearing 1 and introduces itself into the eyelet of the yarn guide l3. From the first eyelet mentioned it follows the axis of rotation of the pot, and therefore it turns on itself when the pot revolves. From the yarn guide, where it describes a right angle E6, the yarn is drawn by the inside wall of the tube of the pot in its rotation and attracted towards it by the tension originated by the centrifugal force of this portion of the yarn.

The winding of the yarn takes place from the outside to the inside and it can be parallel or crossed according to the character of the oscillating movement which is communicated to the rail controlling it, and the proximity of the thread guide to the wall of the pot, permitting the efiicacious guiding of the yarn.

Once the solid body of the yarn has been formed, it has the same truncated cone formation as the pot, with a hollow space in its axis where the yarn guide moves and although it has suflicient consistency to allow of its transport without spool or inside tube, it allows whatever may be suitable to be introduced into it after spinning, owing to the conical form produced by the central hollow space. Its unwinding for later utilization can be effected beginning at the outside end.

Dojfing dc'uices.The tube of the spinning chamber, when it is vertically displaced (taking up the position seen in Fig. II) favouring the separation of the solid body of yarn due to its conical form, constitutes the principal device for its discharging.

This displacement it receives at the two projecting flanges 5-5 near its base, between which is interposed-with a fair amount of play-a fork 6 firmly united with a part which is actuated parallel with the axis of the pot by a rail that raises all those on one side of the machine on effecting the discharge.

The tube 1 on being raised, is guided at its upper part by means of the outer face of the double guide 9 and at its base, by means of the said fork 5 which displaces it.

The tube l on being raised pushes or pulls the yarn guiding mechanism whatever might be its position, leaving absolutely free the space between the two ends of the spinning chamber which contains the solid body formed of yarn.

Once the tube I has been raised, a stop (not shown in the drawing) intervenes, which pushes the solid body of yarn and causes it to fall into a drawer or on to an endless belt situated in front of the spinning frame along the whole of its length, and unwinding from it a small quantity of yarn on joining up with what the rollers supply from the spinning frame.

This yarn guided by a part II in the form of the letter V fixed to the lower rail 8 and in front of the pot, goes to a knife blade l8 carried at its apex, and thus it is cut in the angle it forms there, the solid body discharged thus becoming free, and an end of yarn being left to begin the formation of a new one, which end is sufiiciently long to be imprisoned by the tube I against the elastic ring of the lower plate 2, when it descends while actuated by the same fork 6 which raises it, the cutting of the yarn by the knife It! being helped on closing the angle formed, and giving greater tension.

All the parts composing the centrifugal spinning chamber are constructed of steel adapted to the different strains to which it is subjected, or of other suitable material. The double guide 9 can also be of bronze or any other alloy.

The centrifugal pot may be constructed in different sizes to suit the various thicknesses of yarn.

It is also possible, by decentering one of the members l5--|3, where the yarn passes, to communicate to the pot a vibratory movement during the twisting, thus producing a fuller yarn which is desirable for some applications.

The great speed at which the centrifugal pot according to the present invention is able to work, together with the facility in discharging it, makes it the complement of the modern spinning frames in which high drawing is effected, permitting greater production, suppressing the stoppages, and taking advantage of the characteristic possessed by these machines of using big quantities of roving on a single bobbin.

I claim:-

1. In a centrifugal apparatus for spinning or twisting, the combination, a frame including upper and lower rails, a spinning chamber, including a truncated cone-shaped body, and two end members closing and supporting it by simple contact at both ends, bearing for rotatably supporting the end members, each including a part fixed relatively to the adjacent rail and a rotatable part carrying the adjacent end member, means associated with the rotatable part of the bearing for the lower end member for effecting rotation of the chamber, and means to dofi' the yarn accumulated in the chamber.

2. In a centrifugal apparatus for spinning or twisting, in combination, a lower supporting member, a spherical bearing rigid therewith, an elastic ring above the center of said bearing, a spinning chamber including a truncated cone shaped body the lower edge of which makes contact against the elastic ring, and driving means for the spinning chamber operating on the center of the spherical bearing, permitting its free play and rendering flexible due to this fact, the whole of the spinning chamber, substantially as described and for the purpose set forth.

3. In a centrifugal apparatus for spinning or twisting, in combination, a frame including two rails, a rotatable spinning chamber arranged between the rails and including a cone body and end supporting members, a hollow double guiding member fastened to the upper rail, a spherical bearing for rotatably supporting the upper end member and including a stationary part fixed to said double guiding member, means for effecting the vertical displacement of the body of the spinning chamber upwardly about the end supporting member, means guiding said displacement, and a yarn winding guiding mechanism traversing within the body of the spinning chamber and sliding inside the double guiding member.

4. In a centrifugal apparatus for spinning or twisting in combination, a spinning frame including two fixed rails, a double guiding member suspended from the upper rail, a spinning chamber rotatably mounted between the lower end of the guiding member and the lower rail and including a truncated cone-shaped body vertically dis-.

placeable at times upwardly about the guiding member, means effecting the displacement of the tube, a yarn winding guiding member traversing the spinning chamber and sliding inside the double guiding member, and means for displacing the yarn winding mechanism simultaneously with the chamber.

ALBERTO ARAFO-PRA'I'MARSC'). 

